Self-marking try-square.



W. MUOK. 31.1" MARKING TRY SQUARE.

APPLICATION FILED JUNE 25, 1908.

' Patented Feb. 9, 1909.

Elvwentot witnesses "I! MORRIS PETERS cm, wnsmnanm, n c. I

WILLIAM MUCK, OF D IGKSON CITY, PENNSYLVANIA.

' SELF-MARKING- TRY-SQUARE.

Specification of Letters Patent.

Patented Feb. 9, 1909.

Application filed June 25, 1908. Serial No. 440,379.

To all whom it may concern:

Be it known that I, VILLIAM Muck, citizen of the United States, residing at Dickson City, in the county of-Lackawanna and State of Pennsylvania, have invented cer-,

tain new and useful Improvements in Self- Marking Try-Squares, of which the following is a specification. j

The present invention relates to certain new and useful improvements in try squares of that-character which are commonly employed by carpenters and like artisans, and the object of the invention is the provision of a try square embodying novel means for marking a piece of lumber or like material to which it has been applied without the necessity of employing a pencil, awl, or like separate member. 7

The invention further contemplates a selfmarking try square which-is simple and inexpensive in its construction, can be quickly applied to the lumber in the usual manner and can be easily manipulated to mark the lumber after being properly positioned thereon. I V V For a full understanding of the invention and the merits thereof and also to acquire a knowledge of thedetails of construction and the means for effecting the result, reference is to be had to the following description and accompanying drawings, in which:

Figure 1 is a perspective view showing the try square applied to a board. Fig. 2 is an enlarged plan view of the try square, one of the side plates being removed. Fig. 3 is a transverse sectional view through the blade of the try square on the line 33. of Fig. 2. Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Specifically describing the present em bodiment of the invention, the numeral 1 designates the stock of the try square and 2 the blade which is secured to the stock and the longitudinal ribs 5 which are loosely jecting laterally from opposite faces of the slide 4 at a point toward one end thereof are received within slots 6 formed in opposite sides of the blade and communicating with the channel. The opposite end of the slide to that provided with the ribs 5 is formed with a longitudinal slot 7 loosely receiving a pin 8, the said slot and pin together with the ribs 5 serving to direct the slide in its longitudinal movements. Secured to the outer edge of the slide 4 is a marking blade 9 the longitudinal edges of which project laterally beyond the blade and are toothed at 9 the teeth serving to mark the lumber or like material to which the square is applied when the slide is moved longitudinally. It will be observed that the slide does not extend entirely to the back of the channel 3, but that a space for the reception of.

a coil spring 10 is provided in rear of the slide, one end of the coil spring being connected to the blade while the opposite end is connected to the slide. This spring rmally holds the slide at the limit of its sliding movement in one direction and a finger-piece 11 is provided for moving the slide againstthe action of the spring. This finger-piece is threaded into the slide throughone of the ribs 5 and projects above the blade 2 of the try square so as to be readily accessible After the try square has been properly positioned upon the lumber the finger-piece 11 is engaged'by the thumb and the slide 4 moved against the action of the spring, thereby causing the teeth of the markingblade 9 to leave a mark upon the lumber. As soon as the finger-piece has been released and the try square removed from position the spring 10 will again draw the slide back into normal position.

Having thus described the invention, what is claimed as new is:

1. In a device of the character described, the combination of a square formed with a blade, a slide mounted in the blade, a mark ing blade carried by the slide, a spring normally holding the slide at the limit of its movement in one direction, and means for moving the slide against the action of the spring.

2. In a device of the character described, the combination of a square formed with a blade, the blade being provided with a channel and also with slots communicating with the channel, a slide mounted within the channel and formed with ribs loosely received within the slots, and a marking blade carried by the slide.

7 3. In a device of the character described,

the combination of a square formed with a blade, the blade being provided with a channel, a slide mounted Within the channel and ceived within the slots, the slide being also formed with a longitudinal slot, a pin carried by the blade and projecting within the slot for guiding the slide in its movements, a marking blade carried by the slide, a spring connecting the slide and the blade l l l l and serving to move the slide in one direction, and a fingerpiece applied to the slide for moving the same in the opposite direction.

4. In a device of the character described, the combination of a square formed with a blade, the blade being provided with a channel communicating With longitudinal slots, a slide mounted within the' channel and formed with longitudinal ribs loosely reprovided with a slot, a pin carried by the blade and received within the slot of the slide, a marking blade carried by the slide, a spring connecting the slide and the blade and serving to move the slide in one direc- \VILLIAM MUCK.

WVitnesses FRANK STIELER, MoRRIs Eismznicno. 

